Hey Jimmy thanks for your reply.
I am more wanting the high sample rate just to say that I have it, I agree there is really no reason to record with a higher sample rate than 41,000, I have heard many schools of thought on the subject. I also agree with you about reverb, it all depends on what you are trying to do, I experiment in virtually every genre of music though and want no restrictions. I believe that all my setting on my current computer are fully calibrated to optimize maximum CPU usage. As for my future productions, I am soon to be running a full studio, with no limitations.
No limitations? Then I assume that means money as well. You should look at a commercial/custom built PC, made just for recording. You are looking at 3 to 4G's there.
The interface you use to record with, will have more to do with the sample rate. The PC don't care, it just does what the AD conversion sends it.
You can build a PC yourself, for under a grand, that will do all that you need. There is a recent thread here, based upon that budget. Well, maybe a bit more. You need to determine what 'No Limitations' means to you.
Processor speed, drive speed, drive type, number of drives, backup for the drives, amount of ram, OS capable of using ram, MOBO capable of doing what you ask, video card to handle multiple monitors, number of PCI slots for upgrade, USB ports to handle any adaptations, UPS, power supply needed to run existing/added hardware, cooling system-and how quiet it is, and of course, how cool the thing looks to your friends.
These are all things that come into play, when you have 'no limitations'. I am sure I missed another 20 options.
You need to decide what your actual goal is first.